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Finding the Fourth Proportional to 389,779.76, 538,060.15 and 236,867.15

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Solution

The fourth proportional to 389,779.76, 538,060.15 and 236,867.15 is: 326,976.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,779.76 : 538,060.15 = 236,867.15 : x
  2. Step 2: Convert to fraction form
    389,779.76/538,060.15 = 236,867.15/x
  3. Step 3: Cross multiply
    389,779.76x = 538,060.15 × 236,867.15
  4. Step 4: Simplify right side
    389,779.76x = 127,448,771,568.77
  5. Step 5: Solve for x
    x = 127,448,771,568.77/389,779.76
  6. Step 6: Final answer
    x = 326,976.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.